1231543524550 has 48 divisors (see below), whose sum is σ = 2308076148672. Its totient is φ = 488888524800.

The previous prime is 1231543524479. The next prime is 1231543524571. The reversal of 1231543524550 is 554253451321.

It is a super-2 number, since 2×1231543524550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3305524 + ... + 3659176.

It is an arithmetic number, because the mean of its divisors is an integer number (48084919764).

Almost surely, 2^{1231543524550} is an apocalyptic number.

1231543524550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231543524550 is a deficient number, since it is larger than the sum of its proper divisors (1076532624122).

1231543524550 is a wasteful number, since it uses less digits than its factorization.

1231543524550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354193 (or 354188 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 1231543524550 its reverse (554253451321), we get a palindrome (1785796975871).

The spelling of 1231543524550 in words is "one trillion, two hundred thirty-one billion, five hundred forty-three million, five hundred twenty-four thousand, five hundred fifty".